(define taxonomic-ranks
  '(kingdom phylum class order family genus species))

(define taxonomy
  '(animalia
    (chordate (mammal (primate (hominidae (homo (sapiens (human))))
			       (pongidae (pan (troglodytes (chimpanzee)))))
		      (carnivora (felidae (felis (domestica (house-cat))
						 (leo (lion)))))))
    (arthropoda (insect (diptera (muscidae (musca (domestica (housefly)))))))))


